著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) 高久 雅生,An Analysis on Topic Features and Difficulties based on Web Navigational Retrieval Experiments,"Proc. Asia Information Retrieval Symposium (AIRS) 2006 LNCS, Vol. 4182/2006",,,2006,,,625-632,https://cir.nii.ac.jp/crid/1010282257420805009,